Drop-hammer.



' H. TERHUNE.

DROP HAMMER.

APPLlCATION FILED JUNE 26,19l6- Patented Nov. 13, 1917.

2 SHEETSSHEET I.

' Inventor 3 .Howard Zkrkane .Atcorney H. TERHUNE.

DROP HAMMER.

APPLICATION FILED JUNE 26.1916.

Patented Nov. 13, 1917.

2 SHEETSSHEET 2.

]1zerzt0/' l? "o Jrhune HOWARD TERHUNE, OF CHAMBEBSBURG, PENNSYLVANIA, A SSIGNOR TO, CHAMBERS- BURG ENGINEERING COMPANY, OF TION QF PENNSYLVANIA.

To all whom it may concern: 7

Be it lmown that I, HOWARD TERHUNE, a citizen of the United States, and a resident of-Chambersburg, in the county ofFranklin and State of Pennsylvania, have invented certain new and useful Improvements in Drop-.Hammers, of which the following is a specification. p

My invention relates to improvements in drop hammers and more particularly to improvements in the dro hammer shown in Letters Patent No. 1,03 ,7 35 issued toHenry E. Derbyshire on September 3, 1912.

.My invention is illustrated in the accompanying drawings in which similar letters of reference indicate similar parts throughout the several views, and in which-- Figure 1, a frontelevation of a board drop hammer embodying my improvements:

Fig. 2, a side elevation of the hammer shown in Fig. 1:

Fig. 3, a fragmentary front elevation,

' upon an enlargedscale, of the lower part of hammer shown in Fig. 1: i

Fig. 4, a side elevation, upon an enlarged scale, of the lower part of the hammer shown invFig. 2: v Fig. 5, a side elevation of pin'14 for locking front rod 9 in elevated position. 2 is the anvil and 3 the anvil cap of a board drop hammer, 4: the side frames of the hammer, 5 the ram, 6 the board carrying the ram, 78 the pulleys by means of which the elevating rollers which operate the board which carries the ram are driven. All of these parts are well known and will not need detailed description. 9 is a bar or front rod the upper end of which is pivoted at 10 to the outer end of an arm 11 which is connected with the eccentric means for carrying the front board ele- -vating roll 25 in a well-known manner.

This front rod, when the rolls 25-26 which elevate the board are out of contact therewith, rests upon a stop 12 carried in the frame 4 and carries a knock-off dog 13 which is engaged by the ram 5 in its fall to knock the lower' end of the rod 9 ofi the stop 12 when the weight of this rod and its connected parts operate the eccentric means which cause the elevating rollers to gri and e le-. vate the board 6 as described in t e Derbyshirepatent above referred to.

When the front rod 9 is knocked off its seat or stop 12 it falls upon the top of a Specification of Letters Patent.

cHAMnEnsBUm, PENNSYLVANIA, A conrona,

DROP-HAMMER. Y

Patented Nov. 13, 1917.

Application filed June 26, 1916. Serial No. 105,869

plug 14, which is carried in a vertical hole 15 in'the anvil 2; At its lower end the hole 15 is connected with a horizontal hole 16 through which leather or other washers 17 may be introduced to regulate the height of the plug 14 and to form a cushion to take up the jar of the falling rod '9. The plug 14 may be made of different lengths, or may be adjusted by means of the washers 17 so as to regulate the fall of the 'rodl9. If the fall of this-rod'is too great it will operate the elevating rolls to grip the board too tightly destroying it very quickly.

When the top dies are light and the work isdie to die the elevating rolls 2526 do not have. to grip the board as hard as when there is little rebound. When the work is nearly die to die considerable shock is transferred to all parts of the' hammer, particularly the front rod, and consequently it will fall harder and the elevating rolls will-be locked tighter'against the board than when there is only a slight shock. This means that the board will be pinched hardest when needed least unless some means be provided for re ulating the drop of the front rod.

ottom stops for the front rod are not new but have heretofore been bolted or otherwise attached to the frame. Consequently all shock and jar from the falling frontrod was transferred to the frame. In the present invention all shock and jar is transferred through pin 14 directly to the anvil or base and this pin can be verticallfy adjusted and cushioned without the aid 0 bolts, nuts, or pins, by the use of the washers 17.

All-[hammers require more friction between the board and elevating rolls on a shortstroke than on a long .one. Consequently the fall of the front rod should be readily adjustable in order that proper and; quick regulation may be given.

Near its lower end the rod -9 pases through a movable guide 18 which is held back against the frame 4 by a spring '19 which is carried in a pocket in the frame and at one end bears against one end of this pocket and at the other against a nut 20 In the Derbyshire'patent to which I have i referred is shown a safety latch by means of which the front rod may be held in an elevated position and the machine be prevented from working while repairs or adjustments are being made upon it.

In this invention I make use of the same safety latch but instead of this latch engaging the lower end of the front rod directly it engages and lifts the pin 14. To this end the pin 14 is notched or slotted out as at 21 to receive the short end of the bell crank lever 22 which is pivoted at 23 and which carries the latch 24. If the longer arm of lever 22 be lowered its shorter arm will be raised, lifting with it the pin 14, until the top of the latter is on a level with the top of stop 12; the latch 24 now hangs vertically, its lower end engaging a stop on the anvil 2, and the front rod 9 is prevented from falling, and the operating rolls from engaging the board and lifting the ram, as shown in the aforesaid Derbyshire patent.

Having thus described my invention I claim as new and desire to secure by Letters Patent 1. The combination in a drop hammer of the hammer, lifting rolls, a bar for controlling the operative movements of said rolls, and a cushioned stop carried by the anvil for arresting the drop of said bar.

2. The combination in a drop hammer of the hammer, lifting rolls, a bar for closing said rolls, and an adjustable cushioned stop carried by the anvil for arresting the drop of said bar.

3. The combination in a drop hammer of the hammer, lifting rolls, a bar for controlling the closing of said rolls, an anvil furnished with a vertical hole and with a communicating horizontal hole, and a pin carried by said vertical hole for engagingthe lower end of and for limiting the fall of said bar, and containing washers interposed between the lower end of said pin and the bottom of the vertical hole.

4. The combination in a drop hammer of the hammer, lifting rolls, a roll-controlling bar, an adjustable cushioned stop for arresting the fall of said controlling bar, a lever pivoted to the frame of the hammer, one of the arms of which is adapted to engage and elevate said stop, and a latch carried by said lever arm for holding said stop and the roll-controlling bar in a raised position.

5. The combination in a drop hammer of the hammer, lifting rolls, a roll-controlling bar, a fixed stop upon which the roll-controlling bar rests, a spring actuated guide for holding said bar against the frame of the machine and upon said stop, a knock off dog operated by the falling ram for knocking said bar off its fixed stop, and a combined stop and cushion carried by the anvil for arresting the falling movement of said roll-controlling bar.

6. The combination in a drop hammer of the hammer, a ram connected therewith, lifting rolls, a roll-controlling bar, a fixed stop upon which the roll-controlling bar rests, a spring-actuated guide for holding said bar against the frame of the machine and upon said stop, a knock-off dog operated by the falling ram for knocking said bar off its fixed stop, a safety latch mechanism for holding the bar in raised position and a combined stop and cushion carried by the anvil for arresting the falling movement of said roll-controlling bar.

7. The combination in a drop hammer, of the hammer, lifting rolls, a bar for controlling the operative movements of said rolls, a stop holding the bar in raised posi tion, a stop for limiting the fall of the bar and common means for adjusting the initial height of the second stop and cushioning it.

8. The combination in a drop hammer of the hammer, lifting rolls, a bar for closing said rolls, a vertically movable stop carried by the anvil of the hammer for arresting the drop of the bar and means for setting the stop at different initial heights.

9. The combination in a drop hammer of the hammer, lifting rolls, a roll-controlling.

bar, a stop for arresting the fall of said controlling bar, a lever pivoted to the frame of the hammer, one of the arms of which is intended to engage and elevate said stop and a latch carried by said lever. arm for holding said stop and the roll-controlling bar in a raised position.

HOWARD TERHUNE.

Witnesses:

J. H. KUHN, W. H. FREER. 

